PPRuNe Forums - View Single Post - Qantas 744 Depressurisation
View Single Post
Old 29th Aug 2008, 02:57
  #1036 (permalink)  
Short_Circuit
 
Join Date: Sep 2007
Location: Up left - Down right
Posts: 946
Likes: 0
Received 0 Likes on 0 Posts
Yamagata ken
The bank of cylinders connect to a common medium press supply line to the flow cont units. There are no check valve in the lines so all the cylinder will vent through the ruptured tubing at approx 600 PSI (outlet press of the reducer). The only check valve are in the fill lines.


NSEU
A/P Disconnect, My best GUESS.
Normally a manual input overpowers the CLCP's A/P control servo act. internal regulated pressure (internal CLCP stuff) and allows for manual override without A/P disc. However it is possible with an unusually large and rapid manual input the internal regulated pressure momentarily pressure locked causing the A/P piston to hold against manual input arm whilst the output rod moved creating an error signal between A/P LVDT pos & output LVDT enough to cause the A/P to disengage.

OR a wire was taken out. Unlikely as the Right A/P drives the Left CLCP and I would suggest the wiring would route down the left side of the cargo hold.

Last edited by Short_Circuit; 29th Aug 2008 at 05:44.
Short_Circuit is offline